mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-06 02:24:14 +08:00
1af11d098d
The codes "dev_err(&pdev->dev, "no IRQ resource found\n");" is redundant because platform_get_irq() already prints an error. Signed-off-by: gushengxian <gushengxian@yulong.com> Link: https://lore.kernel.org/r/20210622115507.359017-1-13145886936@163.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
185 lines
4.5 KiB
C
185 lines
4.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* A low-level PATA driver to handle a Compact Flash connected on the
|
|
* Mikrotik's RouterBoard 532 board.
|
|
*
|
|
* Copyright (C) 2007 Gabor Juhos <juhosg at openwrt.org>
|
|
* Copyright (C) 2008 Florian Fainelli <florian@openwrt.org>
|
|
*
|
|
* This file was based on: drivers/ata/pata_ixp4xx_cf.c
|
|
* Copyright (C) 2006-07 Tower Technologies
|
|
* Author: Alessandro Zummo <a.zummo@towertech.it>
|
|
*
|
|
* Also was based on the driver for Linux 2.4.xx published by Mikrotik for
|
|
* their RouterBoard 1xx and 5xx series devices. The original Mikrotik code
|
|
* seems not to have a license.
|
|
*/
|
|
|
|
#include <linux/gfp.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
#include <linux/io.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/gpio/consumer.h>
|
|
|
|
#include <linux/libata.h>
|
|
#include <scsi/scsi_host.h>
|
|
|
|
#include <asm/mach-rc32434/rb.h>
|
|
|
|
#define DRV_NAME "pata-rb532-cf"
|
|
#define DRV_VERSION "0.1.0"
|
|
#define DRV_DESC "PATA driver for RouterBOARD 532 Compact Flash"
|
|
|
|
#define RB500_CF_MAXPORTS 1
|
|
#define RB500_CF_IO_DELAY 400
|
|
|
|
#define RB500_CF_REG_BASE 0x0800
|
|
#define RB500_CF_REG_ERR 0x080D
|
|
#define RB500_CF_REG_CTRL 0x080E
|
|
/* 32bit buffered data register offset */
|
|
#define RB500_CF_REG_DBUF32 0x0C00
|
|
|
|
struct rb532_cf_info {
|
|
void __iomem *iobase;
|
|
struct gpio_desc *gpio_line;
|
|
unsigned int irq;
|
|
};
|
|
|
|
/* ------------------------------------------------------------------------ */
|
|
|
|
static irqreturn_t rb532_pata_irq_handler(int irq, void *dev_instance)
|
|
{
|
|
struct ata_host *ah = dev_instance;
|
|
struct rb532_cf_info *info = ah->private_data;
|
|
|
|
if (gpiod_get_value(info->gpio_line)) {
|
|
irq_set_irq_type(info->irq, IRQ_TYPE_LEVEL_LOW);
|
|
ata_sff_interrupt(info->irq, dev_instance);
|
|
} else {
|
|
irq_set_irq_type(info->irq, IRQ_TYPE_LEVEL_HIGH);
|
|
}
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static struct ata_port_operations rb532_pata_port_ops = {
|
|
.inherits = &ata_sff_port_ops,
|
|
.sff_data_xfer = ata_sff_data_xfer32,
|
|
};
|
|
|
|
/* ------------------------------------------------------------------------ */
|
|
|
|
static struct scsi_host_template rb532_pata_sht = {
|
|
ATA_PIO_SHT(DRV_NAME),
|
|
};
|
|
|
|
/* ------------------------------------------------------------------------ */
|
|
|
|
static void rb532_pata_setup_ports(struct ata_host *ah)
|
|
{
|
|
struct rb532_cf_info *info = ah->private_data;
|
|
struct ata_port *ap;
|
|
|
|
ap = ah->ports[0];
|
|
|
|
ap->ops = &rb532_pata_port_ops;
|
|
ap->pio_mask = ATA_PIO4;
|
|
|
|
ap->ioaddr.cmd_addr = info->iobase + RB500_CF_REG_BASE;
|
|
ap->ioaddr.ctl_addr = info->iobase + RB500_CF_REG_CTRL;
|
|
ap->ioaddr.altstatus_addr = info->iobase + RB500_CF_REG_CTRL;
|
|
|
|
ata_sff_std_ports(&ap->ioaddr);
|
|
|
|
ap->ioaddr.data_addr = info->iobase + RB500_CF_REG_DBUF32;
|
|
ap->ioaddr.error_addr = info->iobase + RB500_CF_REG_ERR;
|
|
}
|
|
|
|
static int rb532_pata_driver_probe(struct platform_device *pdev)
|
|
{
|
|
int irq;
|
|
struct gpio_desc *gpiod;
|
|
struct resource *res;
|
|
struct ata_host *ah;
|
|
struct rb532_cf_info *info;
|
|
int ret;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (!res) {
|
|
dev_err(&pdev->dev, "no IOMEM resource found\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
irq = platform_get_irq(pdev, 0);
|
|
if (irq < 0)
|
|
return irq;
|
|
if (!irq)
|
|
return -EINVAL;
|
|
|
|
gpiod = devm_gpiod_get(&pdev->dev, NULL, GPIOD_IN);
|
|
if (IS_ERR(gpiod)) {
|
|
dev_err(&pdev->dev, "no GPIO found for irq%d\n", irq);
|
|
return PTR_ERR(gpiod);
|
|
}
|
|
gpiod_set_consumer_name(gpiod, DRV_NAME);
|
|
|
|
/* allocate host */
|
|
ah = ata_host_alloc(&pdev->dev, RB500_CF_MAXPORTS);
|
|
if (!ah)
|
|
return -ENOMEM;
|
|
|
|
info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
|
|
if (!info)
|
|
return -ENOMEM;
|
|
|
|
ah->private_data = info;
|
|
info->gpio_line = gpiod;
|
|
info->irq = irq;
|
|
|
|
info->iobase = devm_ioremap(&pdev->dev, res->start,
|
|
resource_size(res));
|
|
if (!info->iobase)
|
|
return -ENOMEM;
|
|
|
|
rb532_pata_setup_ports(ah);
|
|
|
|
ret = ata_host_activate(ah, irq, rb532_pata_irq_handler,
|
|
IRQF_TRIGGER_LOW, &rb532_pata_sht);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rb532_pata_driver_remove(struct platform_device *pdev)
|
|
{
|
|
struct ata_host *ah = platform_get_drvdata(pdev);
|
|
|
|
ata_host_detach(ah);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver rb532_pata_platform_driver = {
|
|
.probe = rb532_pata_driver_probe,
|
|
.remove = rb532_pata_driver_remove,
|
|
.driver = {
|
|
.name = DRV_NAME,
|
|
},
|
|
};
|
|
|
|
#define DRV_INFO DRV_DESC " version " DRV_VERSION
|
|
|
|
module_platform_driver(rb532_pata_platform_driver);
|
|
|
|
MODULE_AUTHOR("Gabor Juhos <juhosg at openwrt.org>");
|
|
MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
|
|
MODULE_DESCRIPTION(DRV_DESC);
|
|
MODULE_VERSION(DRV_VERSION);
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:" DRV_NAME);
|